Motor.



No. 727,434. PATENTED MAY 5", 1903;

T. H. PETTENGILL.

MOTOR.

APPLICATION FILED 0OT.20 1900. RENEWED 00129. 1902 NO MODEL. 3 SHEETS-SHEET 1.

No. 727,434. PATENTED MAY 5,1903.

' T. H. PETTENGILL.

MOTOR.

Y APPLICATION FILED 00120, 1900. RENEWED 001229. 1902.

no MODEL. s SHEETS-SHEET 2.

PATENTED MAY 5, 1903.

T. H. PETTENGILL. v

MOTOR.

APPLICATION FILED 0GT.20, 1900. RENEWED 00129. 1902.

3 SHEETS-SHBET 3.

& "T' a K: it F azwfia fluawtofl'vilinaamo NITE STATES Patented May 5, 1903.

ATENT OFFICE.

MOTOR.

SPECIFICATION forming part of Letters Patent No. 727,434, dated May 5, 1903.

Application filed October 20, 1900. Renewed October 29, 1902. Serial No. 129,333. (No model.)

lb ctZZ whom it may concern:

Be it known that I, TIMOTHY H. PETTEN- GILL, a citizen of the United States of America, residing at Amsterdam, in the county of Montgomery and State of New York, have invented certain new and useful Improvements in Motors, of which the following is a specification.

My invention relates toan improvementin steam or fluid motors; and the object is to make an engine or motor of this type which has its moving parts balanced as to weight and pressure, so that the drum or piston has no vibration when revolving and the steampressure is equal or balanced on opposite sides of the shaft. Ialso make all moving contacts that are to run steam-tight self-adjusting to take up any wear of the parts.

My invention further consists of certain novel features of construction and combinations of parts, as will be more fully described hereinafter and particularly pointed out in the claims.

In the accompanying drawings, Figure l is an end view of the motor with the end platep which closes the end of the cylinder, the bearings, cam-ring, and disk removed, showing the moving parts and inlet and exhaust pipes. Fig. 2 is also an end View of the motor with the end disk and cam-ring put in place to show how the pressure-blades operate in and out of the central drum, the base and piping being omitted. Fig. 3 is a sectional view of the cylinder, taken on the line 3 3 of Fig. 1, showing the central drum with its sliding blades and fingers. Fig. 4 is a detail of one of the blades and its fingers, in which the extra finger at the right is turned part way around to show the slotin the end, which slips over the extreme end of the blade. Fig.6 is a detail of the shaft, showing the slots which receive the sliding blades. Fig. 6 is a detail of one of the disks,showing the slotted grooves corresponding with the slots in the shaft; and Fig. 7 is a view showing the shaft and disks assembled and forming the central drum, dotted lines showing the position of the blades and fingers.

A is the circular cylinder.

B is the enlarged center of the shaft, forming a part of the central drum, which carries the sliding blades and revolves in the center of the cylinder. This drum or shaft has on each end thereof a collar or thick disk B', which is a part of the central drum and revolves therewith and which justfits the bore of the cylinder A, the same as a piston-head in an ordinary steam-engine cylinder, being loose enough to revolve freely. These disks prevent the steam from escaping out of the ends of the cylinder. shaft and its central drum are intended to have some end play, so as not to be held rigid. vIn this way friction is reduced, and the parts At the same time the are not so liable to bind with a heavy belt pull. Said disks also have rings M placed around their centers, the same as a pistonhead, and these rings throw out against the walls of the cylinder. 7

The reference letter on represents the grooves in the disks B which hold the rings M.

The slots 1) are formed in the central drum or shaft B, which carries the sliding blades D D D D, and 1) indicates the grooves formed in the sides of the disks B, which register with the slots 1) in the central drum B,-and these slots b guide the sliding blades D D D D out to the walls of the cylinder A, also affording a seat for the blades when steam-pressure is applied against them. The steam strikes against these sliding blades, and thereby revolves the central drum.

The reference-letter cl represents the fingers, preferably constructed of steel, which slide against the'inner side of the cam-rings E E at each end of the cylinder, and these fingers force the sliding blades into the recesses or slots b of the central drum while the blades are passing the abutments F and F. These stationary abutments F F are placed in slots cut the whole length of the cylinder, and the abutments are so constructed that they run steam-tight against the central drum by reason of having springs placed in the bottom of the slots cut in the cylinder, said springsforcing theabutments against the central drum. The stationary abutments in the cylinder are so placed that they move endwise with the central drum, and in consequence of this construction and arrangement in the construction of the engine and the assemblage of its parts the central drum and abutments are all pushed into the cylinder together. Slots (1 are formed in the ends of the fingers d, so that they can straddle the extreme ends of the sliding blades. This construction not only prevents them from turning in the guide-holes 19?, but also serves to give them a longer bearing-surface.

Let us now suppose that steam is admitted into the cylinder through the pipe H. At J the steam flows two Waystoward the left and into the upper part of the cylinder and toward the right and thence into the lower portion of the cylinder. It will be seen that in the first-named case the steam is confined between the stationary abutment F and the sliding blade D, and in the second case the steam will be confined between the stationary abutment F and the sliding blade D. As the central drum revolves in the direction indicated by the arrow the blades D D are being forced into the slots of the central drum by the fingers d,which bearand slide against the camrings E E until they pass the abutments B F, whereupon the blades D D move out and touch the sides of the cylinder at the points marked 0 in Figs. 1 and 2. Blades D D now being thrust out against the cylinder, the pressure is against them, and the blades D D now begin to leave the walls of the cylinder to pass the stationary abutments. As these blades D D do so the exhaust-steam back of them is allowed to pass out through the exhaust-pipe H to the atmosphere. It will be noticed that while the sliding blades are moving in or out of the central drum there is an equal pressure on both sides of them, which allows them to work easily, and whenthey are clear out against the cylinder and the pressure is applied against them-thatis, only upon one sidethey do not slide in the slots b of the central drum, but merely revolve and bear against the sides of a perfectly round cylin der. Were the blades compelled to move outward when there is a heavy pressure applied upon one side only, they would work hard in the slots of the drum and would very likely stick and allow steam to escape under them into the exhaust side.

This motor is what might be termed a double high-pressure motor, inasmuch as it re ceives steam sim ultaneou sly at two points diametrically opposite one another, thereby balancing the pressure on each side of the central drum, which relieves any strain otherwise placed on the bearings and increases the efiiciency of the motor;

It will be noticed that should the steam be admitted to the upper left-hand portion of the cylinder alone, the pipe conducting the steam to the lower righthand portion being closed, the motor would run at halfpower, provided-there was no pressure against the central drum; but in this case the work would all be done by the upper half of the cylinder, all the pressure bearing against onehalf of the area of the-centraldrum, which.

would press it down in its bearings so hard that a great amount of the power exerted would be taken up in turning the shaft in its bearings. When steam is admitted to both sides of the cylinder, the pressure is equal on both sides of the drum, and all of the power applied to the blades is utilized, there being no strain on the bearings more than the belt pull on the pulley.

A further advantage gained by the use of my invention is found in the fact that the motor will run in one direction just as well as in the opposite and may be reversed at pleasure.

It is evident that slight changes might be made in the form and arrangement of the several parts described without departing from the spirit and scope of my invention, and hence I do not wish to limit myself to the exact construction herein set forth; but,

Having thus described my invention fully, what I claim as new, and desire to secure by Letters Patent, is

1. In a motor, the combination with a cylinder, and a shaft revolubly supported therein, of a drum secured on the shaft, said drum having radial slots formed therein, collars or thick disks secured on the shaft, said collars or disks fitted to the bore of the cylinder whereby to prevent lateral movement of the shaft and form a steam-tight joint, the collars or disks provided with registering radial guide-holes which extend to the periphery thereof, and with recesses in their inner faces in communication therewith which constitute continuations of the inside ends of the radial slots, blades fitted to slide radially within these slots and having their ends confined within the recesses in the collars or disks, fingers operating in the guide-holes, and abutments at opposite points in the wall of the cylinder.

2. In a motor, the combination with a cylinder, and ashaft centered and revolubly supported therein, of a drum secured to the shaft and located within the cylinder, collars located at the outer ends of the drum and fitting the bore of the cylinder whereby to prevent the escape of steam at the ends of the drum, the drum provided with radial slots, blades fitted to slide radially therein, and abutments located in the wall of the cylinder, the collars or disks having guide-holes in alinement with the slots, fingers fitted to slide in and out of said holes and adapted to control the movement of the blades, and cams for sliding the fingers.

3. In a motor, the combination with a cylinder, and a shaft centered and revolublysupported therein, of a drum secured to the shaft and located within the cylinder, collars located at the outer ends of the drum and fitting the hore of the cylinder whereby to prevent the escape of steam at the ends of the drum, the drum provided with radial slots, blades fitted to slide radially therein, and abutments located in the wall of the cylinder, the collars or disks having radial. guide-holes in alinement with the slots, fingers fitted to slide in and out of said holes and adapted to control the movement of the blades, and peripheral cams for sliding the fingers.

4L.- In a motor, the combination with a cylinder, and a shaft revolubly supported therein, of a drum on the shaft, said drum having radial slots, peripheral cams at the ends of the cylinder, blades fitted to slide radially in the slots, fingers extending radially from the blades and bearing against the cams for moving the blades, and abutments which the cams cause the blades to clear.

5. In a motor, the combination with a cylinder composed of a side casing, heads and interposed cam-rings, of a shaft revolubly supported in the cylinder-heads, a drum secured on the shaft, collars or thick disks located at the ends of the drum, these collars or disks fitting the bore ofa cylinder and spanning a greater portion of the spaces formed by the cam-rings, the drum having radial slots formed therein and the collars having guideholes in alinement therewith, blades fitted and adapted to slide radially in the slots, fingers fitted and adapted to operate radially in the guide-holes, they being connected at their inner ends with the blades and in contact at their outer ends with the cam-rings, abutments at opposite points in the side wall of the cylinder, and live and exhaust steam ports located on opposite sides of the abutments.

6. A steam-motor provided with a cylinder, the bore of which is perfectly ronnd,of a drum or piston centrally located within said cylinder, recesses in said drum or piston, blades adapted to slide in said recesses, said drum or piston having situated at either end a thick disk fitting the bore of the cylinder, holes formed in said disks, fingers carried by said disks, a cam-ring placed at each end of the cylinder said fingers adapted to slide against the inner face of the cam-ring which causes said fingers to move in and out of the holes in the disks thereby operating the sliding blades in their recesses, and stationary abutments past which the blades are adapted to pass.

7. In a motor, the combination with a cylinder, heads therefor, and rings provided with internal cams formed by the outline of the openings in the rings, said rings interposed between the ends of the cylinder and the heads of the cylinder,ofa shaft havinga drum thereon, blades having radial sliding connection with the drum, and abutments in the walls of the cylinder which the peripheral cams cause the blades to clear.

8. In a motor, the combination with a cylinder, abutments located in the opposite walls thereof,and rings provided with internal cams formed by the outline of the openings in the rings, said rings interposed and secured between the ends of the cylinder and the heads, the cam-rings being for the most part concentric with the bore of the cylinder and the intermediate portions deflected to correspond to the depth of the abutments, of a shaft, a

drum thereon, and blades having radial sliding connection with the drum said blades operated by the cams to clear the abutments.

9. In a motor, the combination with a cylinder, cylinder-heads and interposed rings provided with internal cams formed by the outline of the openings in the rings, of a shaft revolubly supported in the cylinder-heads, a drum secured on the shaft, collars or disks located at the ends of the drum, these collars or disks fitting the bore of the cylinder and spanning a greater portion of the spaces formed by the cam-rings, a clearance being allowed between the outer ends of the collars and the cylinder-heads which admits of endwise motion to the drum and shaft, and abutments in the walls of the cylinder which moves endwise with the drum and shaft.

10. In a motor, the combination with a cylinder of a drum secured to the shaft, the outer ends of said drum fittingthe bore of the cylinder and centered and revolubly supported within the outer ends of said cylinder, said drum provided with radial slots, blades fitted to slide radially in the slots, fingers extending radially from the blades and bearing against peripheral cams at the ends of the cylinder for moving the blades and abutments which the cams and fingers cause the blades to pass.

11. In a motor, the combination with a cylinder, heads therefor, and rings provided with internal cams formed by the outline of the openings in the rings, said rings interposed between the ends of the cylinder and the heads of the cylinder, of a shaft having a drum thereon, blades having radial sliding connection with the drum, collars located at the ends of the drum, these collars fitting the bore of the cylinder and reaching into the spaces formed by the cam-rings, and packingrings interposed between the collars and bore of the cylinder, to make a steam-tight joint to prevent the steam from passing the collars.

12. In a motor, the combination with a cylinder, and a shaft revolubly supported therein, of a drum secured on the shaft, said drum having radial slots formed therein, collars or thick disks secured on the shaft, said collars or disks fitted to the bore of the cylinder whereby to prevent lateral movement of the shaft and form a steam-tight joint, the collars or disks provided on their inner faces with registering slots which form continuations of the inside portions of the radial slots in the drum, and with guide-holes in communication therewith which extend to the periphery, blades fitted to slide radially within these slots and having their ends confined within the recesses in the collars or disks which do not extend to the periphery, packing-rings in these collars or disks just outside of the ends of the blades to prevent the passage of steam, fingers operating in the guide-holes and abutments at opposite points in the wall of the cylinder.

13. In a motor the combination with a cylinder, and a shaft revolubly supported there-- IIO in, said shaft having a drum thereon, the drum provided with radialslots which extend to the surface of the drum, collars or thick disks on the shaft of greater diameter than the drum and fitting the bore of the cylinder and provided with slots in continuation of the drum-slots but which do not extend to the surface of the drum, and the disks or collars provided with guide-holes which extend from the slots therein to the surface, of blades located in the slots in the drum and collars and pistons or fingers connected with the ends of the blades and movable endwise in the guideholes.

14. In a motor the combination with a cylinder, and a shaft revolubly supported therein, said shaft having a drum thereon, the drum provided with radial slots which extend to the. surface of the drum, collars or thick disks on the shaft of greater diameter than the drum and fitting the bore of the cylinder and provided with slots in continuation of the drum-slots but which do not extend to the surface of the drum, and the disks or collars provided with guide-holes which extend from the slots therein to the surface, of blades located in the slots in the drum and collars and pistons or fingers connected with the ends of the blades and movable endwise in the guide-holes, and cam-rings for forcing the fingers or pistons inward.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

TIMOTHY H. PE'ITENGILL.

Witnesses:

LAURENCE A. SERVISS, WALTER J. HOVER. 

